Microcentrifuge tube rack



FIG. 1 is a perspective view of the microcentrifuge tube rack, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is an upper side elevational view thereof;

FIG. 6 is a lower side elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a vertical cross-sectional view taken in the plane indicated by the line 8--8 in FIG. 2. 

The ornamental design for a microcentrifuge tube rack, as shown. 